Please, what is the Latin use of the phrase "bene gesserit"? Web search is swamped by the results of this phrase being re-used in the science fiction 'Dune' series as the name of a society of female witches:: its author likely knew that "bene" is also Hebrew for "sons of".

A legal phrase // Legale dictum[servire] quamdiu bene gesserit = [to serve] for as long as he behaves [will have behaved] correctly[servire] quamdiu nobis placuerit = [to serve] for as long as he/it will be pleasing to us/me [i.e., "at Our pleasure"]